Introduction
The reveal widget hides or shows its content depending upon the value of a state tiddler. The type of the widget determines the condition for the content being displayed:
- type=match: the content is displayed if the state tiddler matches the text attribute value
- type=nomatch: the content is displayed if the state tiddler doesn't match the text attribute value
- type=popup: the content is displayed as a popup as described in the PopupMechanism
- type=lt: the content is displayed if the state tiddler contains an integer with a value less than the text attribute value
- type=gt: the content is displayed if the state tiddler contains an integer with a value greater than the text attribute value
- type=lteq: the content is displayed if the state tiddler contains an integer with a value less than or equal to the text attribute value
- type=gteq: the content is displayed if the state tiddler contains an integer with a value greater than or equal to the text attribute value
Content and Attributes
The content of the <$reveal> widget is displayed according to the rules given above.
| Attribute | Description |
|---|---|
| state | A TextReference containing the state |
| stateTitle | A title containing the state, without TextReference. Gets preferred over the state attribute |
| stateField | A field name which is used to look for the state, if the attribute stateTitle is present |
| stateIndex | An index which is used to look for the state, if the attribute stateTitle is present |
| tag | Overrides the default HTML element tag (<div> in block mode or <span> in inline mode) |
| type | The type of matching performed: match, nomatch, popup, lt, gt, lteq or gteq |
| text | The text to match when the type is match, nomatch, lt, gt, lteq or gteq |
| class | An optional CSS class name to be assigned to the HTML element » Set to tc-popup-keep to make a popup "sticky", so it won't close when you click inside of it |
| style | An optional CSS style attribute to be assigned to the HTML element |
| position | The position used for the popup when the type is popup. Can be left, above, aboveleft, aboveright, right, belowleft, belowright or below |
| positionAllowNegative | Set to "yes" to prevent computed popup positions from being clamped to be above zero |
| default | Default value to use when the state tiddler is missing |
| animate | Set to "yes" to animate opening and closure (defaults to "no"; requires "retain" to be set to "yes") |
| retain | Set to "yes" to force the content to be retained even when hidden (defaults to "no") |
| updatePopupPosition | Introduced in v5.1.23Set to "yes" to update the popup position when the state tiddler is updated (defaults to "no") |
Examples
Two distinct buttons toggle the state of the tiddler value. The reveal widget displays its content for one of the two states.
| title | Output |
Two distinct buttons toggle the state of the tiddler value. Two reveal widgets. The first displays the button to show the content. The second displays both the content and the button to hide the content.
| title | Output |
When the button is clicked, the tiddler specified by the popup attribute is filled with the click coordinates. The reveal widget uses these coordinates to position the popup content.
| title | Output |
The state attribute of the reveal widget can use the text reference syntax to refer to a specific field. In this example if the field jeremy contains the text tiddlywiki, then the reveal widget's content will be displayed.
| title | Output |
| jeremy | tiddlywiki |
TiddlyWiki!